Deflecting plate for stokers



Sept. 29, 1925. 1,554,982

O. ARAM I DEFLECTING PLATE RoR SToxERs Filed oct. 19. 1922 0..,Aram

OTNESSE: INVENTOR Patented Sept. 29, 1925.

` UNITED STATES PATENT OFFICE.

OTTO ARAM, OF PHILADELPHIA, PENNSYLVANIA, ASSIG-NOR TO 'WESTINGrHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF 1?IN'NSYLVZBNIA` DEFLECTING PLATE FOR STOKERS.

Application led October 19, 1922. Serial No. 595,5?6.

To all whom it may concer/b:

Be it known that I, O'r'ro ARAM, a cltizen of the United States,A and a resident of Philadelphia, in the county of Philadelphia 5 and State of Pennsylvania, have invented a new and useful Improvement in Deflecting Plates for Stokers, of which the following is a specification.

This invention relates to progressive-feed furnaces, more particularly to furnaces in which fuel is introduced into retorts in accordance with the underfeed principle, and has for an object to provide, in an apparatus of the character designated, fuel-supporting and directing members which shall be capable of being adjustably supported 1n different positions for theV purpose of securing efficient distribution of the fuel under varying conditions of furnace operation and for different grades of fuel employed. A

further object of my invention is to provide directing members of this character in which the joints at the movable edges of the members shall not permit a sifting of fuel therethrough, even after deformation of the l members caused by erosion, `heat or other conditions to which the fuel-supporting members of high duty furnaces are subjected.

These and other objects, which` are made more manifest in the further description of my invention, may be attained by the employment of the apparatus illustrated in the accompanying drawing, in which Fig. 1 is a fragmentary View, in longitudinal section', of an underfeed stoker embodying my novel fuel-supporting and directing members; and Fig. 2 is a view in transverse section through the retorts on line lI-II of Fig. l.

It has been heretofore proposed to employ an adjustable deector plate within the path of travel of fuel in a progressive-feed furnace of the underfeed type, and its use has been attended with mostsatisfactory results. Such a construction is shown in the United States Patent No. 1,220,161, granted March 20, 1917, and assigned to the Westinghouse Electric and Manufacturing Company. Experience has demonstrated, however, that the erosive action of fuel dust, particularly Where a slight deformation of the metallic members is caused by the high temperatures of the furnace, frequently develops in service in these earlier structures a seam or open joint along the edge of the movable deflector plate which permitsv an objectionable sifting of the fuel into the air chamber below.

In the present invention, I have remedied this deficiency of the former structures and at the same time have provided an extremely rugged and satisfactory adjustable support for the delector member.

Referring to the drawing, I show at 10 an underfeed Stoker having a retort 11 and tuyere banks 12 supported upon a frame 13, as 1s usual in this type of structure. An a1r box 14, front wall 15, ram box 16 and ram 17 are also of a conventional construction.

Within the retort 11 is disposed a fuel deflector 20, mounted to swing about its forward end which may be supported upon the frame 13 and held against a forward or upward'movement by the ram box 16 and a U-bolt 21 'passing through the defiector 20 and secured to the frame 13. As shown, a depending flange 22 is provided at the rear edge of the deiector, the exterior lateral surface of the flange being fluted to form a series of horizontally extending grooves 23. A retainer member 2.5 is detachably secured to the retort in any suitable manner, as by vbolts 26. The retainer 25 has a forwardly extending portion 27 in which grooves 28 are formedto coact with the grooves 23 for supporting the defiector in any of the several positions of adjustment.

It is obvious from the above description that the deflector member may be rigidly4 held in any required position and that the joint between the members is of such a character that closeness of fit is unnecessary to prevent a sifting of fuel between them. Furthermore, the weight of the fuel upon the deflector 20 insures a positive engagement of the fluted enga-ging surfaces, should any tendency for the joint to open develop for any reason.

In order to change the position of the deflector 20, it is only necessary to remove the bolt 26, withdraw the retainer 25 and move the defiector 20 to the desired position. The retainer 25 and the bolt 26 are then replaced to rigidly support the defisctor plate in its new sition.

The construction ogothe present invention gives a rugged structure which is capable of withstanding the severe service to which fuel-supporting members in high duty furnaces are subjected, provides for adequate adjustment for varying operating condiions, and prevents wasteful sifting of the uel.

While I have shown my invention in but one form, it Will be obvious to those skilled in the 'art that it is not so limited, but is susceptible of various other changes and modifications, without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What I claim is:

1. In a furnace having a fuel support including a trough-shape retort and means for moving Ifuel into and through said retort, a fuel delector in said retort within the path of travel of the fuel, a member secured to the retort and engaging the rear end of the deiector, the surfaces of engagement between the deflector and the member being horizontally fluted for the support of the delector at different elevations and for preventing the sifting of fuel between the deflector and 'said member.

2. In a furnace having a fuel support including a trough-shaped retort and means for moving fuel into and through said retort, a fuel deilector in said retort within the path of travel of the fuel, said delector having a depending flange atits rear edge, the outer surface of the flange being horizontally fluted, a member secured to the retort and having a iiuted portion engaging the flange, whereby the rear edge of the deflector may be supported at a plurality of elevations and the sifting of fuel at the supporting edge prevented.-

3. In a progressive-feed furnace, a fuel support including two contiguous members over which fuel successively passes, means for supporting the contiguous ends of the members at relatively diiferent elevations includingl horizontal engaging tongues on said members, whereby sifting of fuel between the members in any position is prevented.

4. In a progres-sive feed furnace, a fuel.

support including a ,fuel receiving member, a fuel discharging member contiguous thereto, said fuel receiving member having a depending flange contiguous to said fuel discharging member, said members having cooperating luted portions, and means for holding the fuel receiving member and the fuel discharging member in engagement at relatively different elevations, whereby sifting of fuel between said receiving member and said discharging member is prevented. In testimony whereof, I have hereunto subscribed my name this 17th day of October 1922.

OTTO ARAM 

